1 / 19

Energy balances in water savings and reuse programmes

Energy balances in water savings and reuse programmes. Process to save water and energy. Pat McCafferty General Manager Strategy & Communications IWA World Water Congress Vienna, 9 September 2008. Overview. Background Objective Methodology Business value Summary.

martin-foreman
Download Presentation

Energy balances in water savings and reuse programmes

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Energy balances in water savings and reuse programmes Process to save water and energy Pat McCafferty General Manager Strategy & Communications IWA World Water Congress Vienna, 9 September 2008

  2. Overview • Background • Objective • Methodology • Business value • Summary Yarra Valley Water Ltd

  3. BackgroundThe retail water sector in Melbourne Yarra Valley Water Ltd

  4. BackgroundMelbourne’s Water Industry City West Water, Melbourne Water Melbourne Water South East Water, Yarra Valley Water Headworks Bass Strait disposal Eastern Treatment Disinfection Plant Plant Delivery of Sewage Transmission water and sewerage Sewer Main services to final (inc.trade waste) customers Western Treatment Plant River Diversion Treatment Reservoirs disposal Local Plant Storm Water Treatment Plant Port Storm Water Drainage Phillip Bay Yarra Valley Water Ltd responsibility of local council

  5. Worst Drought in our History Suddenly got Even Worse Yarra Valley Water Ltd

  6. BackgroundResource Constraints • Not enough water • need to reduce demand by 30% by 2015 • Need to increase rivers flows • Too much Greenhouse Gas • Committed to being GHG net neutral • 40% increase in 10 years with growth • Could increase 300% with desalination • Discharge too many nutrients • need to reduce discharge of nitrogen into bay by 1000 tonnes • Australian soils are nutrient poor Yarra Valley Water Ltd

  7. Objective • Develop process : • that provides the business with information to show the interconnection of water and energy • which can be used in major business decision making to get the best outcomes Yarra Valley Water Ltd

  8. Customer MethodologyWater System Overview Delivery Infrastructure Catchment Treatment Water Sewer Yarra Valley Water Ltd

  9. MethodologyData Used Spatial Zone Information Energy Maps Output Zone Operation Information General Asset Data Empirical Formula Asset Flow Data EnergyBills Yarra Valley Water Ltd

  10. Methodology Energy Density Map - Water Supply Yarra Valley Water Ltd

  11. Methodology Energy Density Map – Sewage Disposal Yarra Valley Water Ltd

  12. MethodologyEnergy Density Map - Combined Yarra Valley Water Ltd

  13. Business valueShowerhead retrofit program Map shows payback period from reduced energy use by Company if it funds a shower retrofit program at $40 per retrofit. Yarra Valley Water Ltd

  14. Business valueRainwater tank rebate Map shows payback period from reduced energy use by Company if it funds a $300 rebate program for rainwater tanks. Yarra Valley Water Ltd

  15. Customer valueShowerhead retrofit program Kenway S. (2007) Personal communication Yarra Valley Water Ltd

  16. Energy savings from showerheads offset GHG emissions….. Yarra Valley Water Ltd

  17. Business valueInfrastructure planning Yarra Valley Water Ltd

  18. Onsite water supply and greywater Recycling from Stormwater Recycling From Sewage Business valueCommunity cost benefit Actual Costs Imported Water $1 per KL 1,600.00 Nitrogen $800 per kg GHG $20 per tonne 1,400.00 1,200.00 1,000.00 Total Community Cost $ Millions 800.00 600.00 400.00 Conventional 200.00 0.00 Environmental improvements don’t always cost more Yarra Valley Water Ltd

  19. SummaryProcess to save energy and water • We live in a world with resource constraints • Better decisions will be made having a process that shows interconnections • Energy density maps deliver that benefits • Experience has shown that it can help with the following: • Deliver customer value with showerhead retrofits • Business value with reduced environmental impacts and operational costs • Community value with better infrastructure selection Yarra Valley Water Ltd

More Related